3 Impelled, therefore, by a constant desire that Christians should ever beconvinced of the efficacy and dignity of the Rosary of Our Lady, We first of allpointed out that the origin of this form of prayer is divine rather than human,showing it to be an admirable garland woven from the Angelic Salutation,together with the Lord's Prayer, joined to meditation, and that this form ofprayer was most powerful and particularly efficacious for attaining eternallife. For besides the special excellence of the prayers, it affords a powerfulprotection to faith and conspicuous models of virtue in the mysteries proposedfor contemplation. We showed also how easy the devotion is and how suited to thepeople, offering an absolutely perfect model of domestic life in meditation onthe Holy Family at Nazareth, and that therefore Christendom had never failed toexperience its salutary effects.
Source: Diuturni Temporis (Vatican.va)